当前期刊: Astrophysical Bulletin Go to current issue    加入关注   
显示样式:        排序: IF: - GO 导出
我的关注
我的收藏
您暂时未登录!
登录
  • Ha Images of Ultra-Flat Edge-On Spiral Galaxies
    Astrophys. Bull. (IF 0.969) Pub Date : 2020-04-15
    S. S. Kaisin, I. D. Karachentsev, H. Hernandez-Toledo, L. Gutierrez, V. E. Karachentseva

    Abstract—We present the Hα images of ultra-flat (UF) spiral galaxies seen practically edgeon. The galaxies have the angular diameter in the B band \(a > 1.9' \) and the apparent axial ratio (a/b) > 10. We found that their Hα images look, on average, almost two times thinner than those in the red continuum. The star-formation rate in the studied objects, determined from the Hα flux, is in good agreement

    更新日期:2020-04-15
  • Photosensor Device Based on a 16-Electrode Position-Sensitive Detector with High Temporal Resolution
    Astrophys. Bull. (IF 0.969) Pub Date : 2020-04-15
    V. L. Plokhotnichenko, G. M. Beskin, S. V. Karpov, A. V. Solin, A. A. Solin, A. S. Terekhov, S. N. Kosolobov, G. E. Scheibler, V. G. de Bur, S. V. Moiseev, V. V. Pavlova, S. S. Moiseev

    Abstract—We report the development of a photosensor device based on a position-sensitive detector with a gallium arsenide (GaAs) cathode and a 16-element anode. In the case of asymmetric heterostatic circuit (electrodes combined in fours) its working field was limited by 10 mm (for a 18-mm photocathode). Implementing a scheme of analog coding of the coordinates of the centroids of electron avalanches

    更新日期:2020-04-15
  • Inconsistency of Chemical Properties of Stellar Populations in the Thick Disk Subsystem of our Galaxy
    Astrophys. Bull. (IF 0.969) Pub Date : 2020-04-15
    V. A. Marsakov, V. V. Koval’, M. L. Gozha

    Abstract—Using modern published data on velocities and spectroscopic definitions of chemical elements in stellar objects of the Galaxy, we investigated the relationship of chemical composition with the kinematics of different populations. The paper shows that the old stellar populations of the Galaxy, belonging (by the kinematic criterion) to the thick disk subsystem—globular clusters, field variables

    更新日期:2020-04-15
  • Internal Kinematics of the Seyfert Galaxy Mkn938
    Astrophys. Bull. (IF 0.969) Pub Date : 2020-04-15
    V. L. Afanasiev, A. V. Moiseev, A. A. Smirnova

    Abstract—We report the results of a detailed study of the central part of the Seyfert galaxy Mkn938. Observational data were obtained with the 6-m telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences using integral field spectrograph MPFS and a scanning Fabry–Perot interferometer. Mkn938 is interesting for being a result of a merger of two gas-rich galaxies, and we

    更新日期:2020-04-15
  • IPv6 for the Evolution of the Network of the Special Astrophysical Observatory of the Russian Academy of Sciences
    Astrophys. Bull. (IF 0.969) Pub Date : 2020-04-15
    V. N. Chernenkov

    Abstract—Requirements to a modern computer network of a research organization, in particular, to the local-area network of the Special Astrophysical Observatory of the Russian Academy of Sciences (SAO RAS) are described. The choice of the direction of the development of primary tools for supporting the observing process and based on local network infrastructure services of SAO RAS is defined. This

    更新日期:2020-04-15
  • Effective Gyroresonance Layers in the Transition Region of the Active Region of the Solar Atmosphere. Magnetic Fields and Heights
    Astrophys. Bull. (IF 0.969) Pub Date : 2020-04-15
    L. V. Yasnov, V. M. Bogod, A G. Stupishin

    Abstract—We present a method of determination of numbers of gyroresonance layers most effectively radiating in the transition region of the active solar atmosphere. It is based on determination of frequency in the spectrum of an extraordinary wave of an active region, at which the gradient of this spectrum abruptly rises. Observations of 29 active regions carried out at the RATAN-600 radio telescope

    更新日期:2020-04-15
  • Small Bodies of the Solar System Active at Large Heliocentric Distances: Studies with the 6-Meter Telescope of Sao Ras
    Astrophys. Bull. (IF 0.969) Pub Date : 2020-04-15
    A. V. Ivanova

    Abstract—A detailed study of comets active at large heliocentric distances (greater than 4 au) which enter the Solar System for the first time and are composed of matter in its elementary, unprocessed state, would help in our understanding of the history and evolution of the Solar System. In particular, contemporary giant planet formation models require the presence of accretion of volatile elements

    更新日期:2020-04-15
  • Spectral Properties of Background Signal Peaks at Medium and High Multipoles
    Astrophys. Bull. (IF 0.969) Pub Date : 2019-12-10
    V. V. Pushkarev, E. K. Majorova, O. V. Verkhodanov

    The spectral properties of inhomogeneities of the cosmic microwave background are considered. The inhomogeneity spectra are studied in the frequency range from 30 to 217 GHz according to multi-frequency maps of the Planck space mission with smoothing at different angular sizes. According to the thermodynamic temperature versus frequency relation, it is shown that the map at 70 GHz has a signal distribution

    更新日期:2019-12-10
  • Distance to Irregular Galaxy Cas 1 Located near the Milky Way
    Astrophys. Bull. (IF 0.969) Pub Date : 2019-12-10
    N. A. Tikhonov

    We conducted the stellar photometry using the archive images of the Hubble Space Telescope of the dwarf irregular galaxy Cas 1 located near the Milky Way. Blue supergiants detected in the obtained Hertzsprung-Russell diagram are concentrated in star-forming regions. We found that the red star branch consists of numerous AGB stars and a small number of brighter red supergiants. In the luminosity function

    更新日期:2019-12-10
  • Multifrequency Study of GHz-peaked Spectrum Sources
    Astrophys. Bull. (IF 0.969) Pub Date : 2019-12-10
    Yu. V. Sotnikova, T. V. Mufakharov, E. K. Majorova, M. G. Mingaliev, R. Yu. Udovitskii, N. N. Bursov, T. A. Semenova

    Gigahertz-Peaked spectrum (GPS) sources are compact active galactic nuclei, presumably young precursors of bright radio sources. The study of GPS radio properties provides information about the features of synchrotron radiation in extragalactic sources. Also in applied research, GPS sources are useful as compact stationary radio sources in the sky for astrometric purposes. This paper presents the results

    更新日期:2019-12-10
  • Globular Clusters of the Galaxy: Chemical Composition vs Kinematics
    Astrophys. Bull. (IF 0.969) Pub Date : 2019-12-10
    V. A. Marsakov, V. V. Koval’, M. L. Gozha

    A comprehensive statistical analysis of the relationship between the chemical and spatially kinematic parameters of the globular clusters of the Galaxy has been performed. The data of the author’s compilation catalog contain astrophysical parameters for 157 clusters and the relative abundances of α-elements for 69 clusters. For 121 clusters, the data are supplemented by spatially kinematic parameters

    更新日期:2019-12-10
  • Galaxy Clusters and Their Outskirts: the “Red Sequence”, Star Formation Rate, Stellar Mass
    Astrophys. Bull. (IF 0.969) Pub Date : 2019-12-10
    F. G. Kopylova, A. I. Kopylov

    We study the nearest outskirts (R < 3R200c) of 40 groups and clusters of galaxies of the local Universe (0.02 < z < 0.045 and 300 km s-1 < σ < 950 km s-1). Using the SDSS DR10 catalog data, we determined the stellar mass of galaxy clusters corresponding to Ks-luminosity (which we determined earlier based on the 2MASX catalog data) (M*/M⊙) ∝ (LK/L⊙)1.010±0.004 (MK < - 21m.5, R < R200c). We also found

    更新日期:2019-12-10
  • Photometric Studies of 21 Eclipsing Binaries with Eccentric Orbits
    Astrophys. Bull. (IF 0.969) Pub Date : 2019-12-10
    V. S. Kozyreva, A. V. Kusakin, T. Krajci, A. I. Bogomazov

    The paper describes a target setting of searching for apsidal motion in 21 eclipsing binaries. We estimate the capability of its determination for the systems of interest in the coming years, as well as present results of observations in 2009–2018, in which the minima of the light curves of these stars have been obtained. The accuracy of orbital period determination of the studied binaries is 10–100

    更新日期:2019-12-10
  • Large Scale Distribution of Galaxies in The Field HS 47.5-22. I. Data Analysis Technique
    Astrophys. Bull. (IF 0.969) Pub Date : 2019-12-10
    A. A. Grokhovskaya, S. N. Dodonov

    We present the results of methodological works on automated analysis of the large scale distribution of galaxies. Selecting candidates for clusters and groups of galaxies was carried out using two complementary methods of determining the density contrast maps in the narrow layers of the three-dimensional large scale distribution of galaxies: the filtering algorithm with an adaptive core and the Voronoi

    更新日期:2019-12-10
  • Long-Term Activity of a Little Known Dwarf Nova DT Octantis
    Astrophys. Bull. (IF 0.969) Pub Date : 2019-12-10
    V. Šimon, H. Edelmann

    We analyze the long-term activity of a little known dwarf nova (DN) DT Oct. We use photographic observations from the Bamberg Observatory (Southern Patrol Photographic Sky Survey), CCD data from ASAS-3 survey, and AAVSO data (both CCD and visual). We determined the recurrence times of the superoutbursts, TCso, and of the normal outbursts, TCno, to be approximately 311 d and about 30 d, respectively

    更新日期:2019-12-10
  • Analysis of the Spectroscopic Observations of RS CVn Type Star V837 Tau
    Astrophys. Bull. (IF 0.969) Pub Date : 2019-12-10
    A. I. Kolbin, V. V. Shimansky, I. Yu. Alekseev, N. N. Shimanskaya, M. M. Gabdeev, V. V. Tsymbal

    We present an analysis of the spectra of the star V837 Tau, which belongs to a class of chromosphere-active RSCVn type stars. The observational material was obtained with the 1.5-m Russian-Turkish telescope RTT-150 and the 2.6-m Shajn telescope of the Crimean astrophysical observatory. To reveal signs of the photosphere spottedness of the primary and to isolate the faint secondary, we performed the

    更新日期:2019-12-10
  • Variations in the Brightness Variability Amplitude of A–M Stars
    Astrophys. Bull. (IF 0.969) Pub Date : 2019-12-10
    I. S. Savanov

    We study relations of the parameter Rvar (amplitude of the brightness variability, stellar activity indicator) with respect to the effective temperature and the period of rotation of stars belonging to the A–M spectral types. A common dataset gives an idea of variations in this parameter for stars with convection. It was confirmed that the limit of applicability for the gyrochronological relation PtM

    更新日期:2019-12-10
  • Physical and Dynamical Parameters of the Triple Stellar System: HIP 109951
    Astrophys. Bull. (IF 0.969) Pub Date : 2019-12-10
    S. G. Masda, J. A. Docobo, A. M. Hussein, M. K. Mardini, H. A. Al-Ameryeen, P. P. Campo, A. R. Khan, J. M. Pathan

    The precise determination of the physical and dynamical parameters of the HIP 109951 triple star system (WDS J22161-0705AB) which is formed by the A, Ba, and Bb components are presented. The binary nature of component B was recently confirmed by studying the radial velocities. The analysis of the system follows Al-Wardat's complex method for analyzing CVBS which employs Kurucz (Atlas9) line blanketed

    更新日期:2019-12-10
  • The Synchronous Calibration Method for the RATAN-600 using Its Two Sectors
    Astrophys. Bull. (IF 0.969) Pub Date : 2019-12-10
    Yu. V. Sotnikova, Yu. A. Kovalev, A. K. Erkenov

    A method of “self-calibration” of two sectors of the RATAN-600 radio telescope based on synchronous measurements of strong extragalactic sources, including variable ones, is proposed. The method gives refined corrections to the standard calibration of each of the telescope’s sector. It is based on the fact that ideal synchronous independent measurements of the same object should give the same results

    更新日期:2019-12-10
  • Magnetic Fields of Chemically Peculiar and Related Stars. 5.Main Results of 2018 and Near-Future Prospects
    Astrophys. Bull. (IF 0.969) Pub Date : 2019-12-10
    I. I. Romanyuk

    We have surveyed about a hundred papers published in 2018 in the leading astronomical journals and related to the “Magnetic fields and physical parameters of chemically peculiar and related stars” subject area. We have considered new projects of telescopes and mounted instruments for them as well as the first results obtained with telescopes recently put into operation. We have reviewed new papers

    更新日期:2019-12-10
Contents have been reproduced by permission of the publishers.
导出
全部期刊列表>>
智控未来
聚焦商业经济政治法律
跟Nature、Science文章学绘图
控制与机器人
招募海内外科研人才,上自然官网
隐藏1h前已浏览文章
课题组网站
新版X-MOL期刊搜索和高级搜索功能介绍
ACS材料视界
x-mol收录
湖南大学化学化工学院刘松
上海有机所
廖良生
南方科技大学
西湖大学
伊利诺伊大学香槟分校
徐明华
中山大学化学工程与技术学院
试剂库存
天合科研
down
wechat
bug